- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 33/13 - Methods or devices for cementing, for plugging holes, crevices, or the like
Patent holdings for IPC class E21B 33/13
Total number of patents in this class: 2559
10-year publication summary
|
228
|
289
|
273
|
208
|
177
|
165
|
186
|
132
|
85
|
24
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
733 |
| Schlumberger Technology Corporation | 9690 |
137 |
| Saudi Arabian Oil Company | 11322 |
119 |
| Schlumberger Canada Limited | 6913 |
100 |
| Schlumberger Technology B.v. | 4951 |
85 |
| Services Petroliers Schlumberger | 5426 |
84 |
| Thru Tubing Solutions, Inc. | 361 |
69 |
| Baker Hughes Incorporated | 5689 |
53 |
| ConocoPhillips Company | 1657 |
53 |
| Schlumberger Holdings Limited | 2947 |
46 |
| Baker Hughes Holdings LLC | 3060 |
46 |
| Prad Research and Development Limited | 2696 |
41 |
| Weatherford Technology Holdings, LLC | 2135 |
38 |
| Bisn Tec Ltd | 74 |
36 |
| Hydra Systems AS | 38 |
28 |
| Baker Hughes, a GE Company, LLC | 2171 |
22 |
| Aramco Services Company | 3504 |
20 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
19 |
| ExxonMobil Upstream Research Company | 2525 |
17 |
| Statoil Petroleum AS | 555 |
17 |
| Other owners | 796 |